Security readout for executives and security teams
Plain-English summary
CVE-2026-20415 is a MediaTek chipset issue that can crash affected devices through a local denial-of-service condition. The attacker must already have elevated local privileges, described as System privilege, and no user interaction is required. Business urgency is moderate: prioritize affected device fleets, but this is not described as remotely exploitable or actively exploited.
Executive priority
Treat as a moderate mobile/device-fleet maintenance priority. Patch affected assets during the next regular security update cycle, faster for high-value or operationally critical devices. This is not presented as a remote takeover risk.
Technical view
MediaTek reports memory corruption in imgsys caused by improper locking, associated with CWE-415. Affected chipsets listed are MT6897 and MT6989. The stated impact is local denial of service with high availability impact, no confidentiality or integrity impact, and CVSS 3.1 score 5.5. Patch ID is ALPS10363254; Issue ID is MSV-5617.
Likely exposure
Exposure is limited to devices using MediaTek MT6897 or MT6989 chipsets that have not received the relevant vendor or OEM security update. The advisory does not identify specific phone models, firmware builds, or operating system versions.
Exploitation context
The source data does not indicate active exploitation, and the CVE is not listed as KEV. Exploitation is local, requires existing privilege, and needs no user interaction. The practical risk is service disruption on already-compromised or locally controlled devices.
Researcher notes
Public details are sparse. The record names imgsys, improper locking, memory corruption, CWE-415, and patch ID ALPS10363254, but does not provide affected firmware ranges or model mappings. Avoid assuming exploitability beyond local denial of service requiring prior elevated privilege.
Mitigation direction
- Check MediaTek’s February 2026 bulletin and OEM advisories for ALPS10363254 updates.
- Prioritize updates for devices with MT6897 or MT6989 chipsets.
- If no OEM update is available, request remediation status from the device vendor.
- Limit exposure from untrusted local apps through mobile device management controls where applicable.
Validation and detection
- Inventory managed devices for MediaTek MT6897 or MT6989 chipsets.
- Confirm installed firmware includes the vendor fix for ALPS10363254.
- Review OEM security bulletins for matching device models and patch levels.
- Monitor device stability reports for unexplained local denial-of-service symptoms.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CWE-415: Exact CWE lookup
Use the exact CWE identifier as the starting point before reviewing related ATT&CK behavior. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupCVE-2026-20415 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- Medium
- CVSS
- 5.5 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
CVSS vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H1.83.6Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
5.5MediumVector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Source materials
- CVE List V5 sourceCVE List V5
- https://corp.mediatek.com/product-security-bulletin/February-2026CVE reference
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.
Double Free
Double Free represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.